Review
Cheap but very good. I never had a misfire when I had these plugs inside my engine. Starting the car also damn fast, and mileage also got better. Acceleration and idling also became smooth and silent, and the plugs managed to last for quite long.

Review
It managed to last about 6 months for me, so it should last much longer for those who don't push their cars to the limit every week. It never had a misfire and acceleration and idling was consistently smooth and quiet. Very decent spark plug.

Review
It's cheap but very, very good. My car starts immediately and has never hesitated with this spark plug in my car. When idling, it's so smooth I can't even hear my engine humming away. And when I accelerate, there is almost no more lag and the acceleration curve is smooth and consistent. And finally and best of all, my fuel mileage has improved.